SI4112-D-GT - 1 GHz Dual-Band RF Synthesizer | Skyworks
料号： SI4112-D-GT ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
SI4112-D-GT 概述
A frequency synthesizer is a phase-locked-loop timing and RF component that locks a voltage-controlled oscillator to a stable reference frequency. The SI4112 family integrates the VCO circuitry and associated RF functions, reducing the need for external VCOs, varactor diodes, and passive networks. The manufacturer specifically identifies dual-band and IF synthesis as useful functions for wireless personal-communications equipment.
The verified product data establishes a maximum listed frequency of 1 GHz and a single output channel. It also identifies a 24-TSSOP surface-mount package with a 0.173-inch body width and 4.40 mm overall width. Skyworks states that the integration can reduce external passive-component count, eliminate external VCOs and varactor diodes, and improve power efficiency compared with less-integrated implementations.
This device belongs to the RF synthesizer hierarchy: RF frequency synthesizer → PLL → clock and timing IC → integrated circuit. Its integrated VCO architecture makes it relevant to compact wireless receivers and transmitters where board area, external component count, and power efficiency are important. The provided sources describe the part for wireless personal communications rather than high-end test equipment or precision instrumentation.
Typical uses include RF down-conversion and up-conversion systems, wireless communication transceivers, and compact RF signal chains requiring programmable frequency generation. The IF output allows the synthesized signal to be used as an intermediate-frequency source in a receiver or transmitter architecture. The available verified data does not establish exact operating voltage, tuning range, phase-noise values, output power, temperature limits, or pin-level electrical limits.
Designers should verify the complete manufacturer datasheet before layout or RF matching. The 24-pin TSSOP footprint requires careful high-frequency routing, controlled ground return paths, and decoupling close to the device pins. Because this is a frequency-sensitive RF component, component tolerances, reference-frequency stability, loop-filter implementation, and output matching can materially affect system performance.
This page consolidates verified distributor identity, package information, manufacturer application context, pricing fields marked as data-needed, and replacement-search limitations for SI4112-D-GT. It does not invent undocumented electrical ratings or treat generic cross-reference search results as verified drop-in equivalents.
直接替换替代料： SI4112-D-GT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： SI4112-D-GT （相同外形与封装尺寸） ——差异在于 External VCO Requirement, Package.
快速对比工具——选择替代料号进行并排对比：
SI4112-D-GM
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →SI4112-D-GTR
✅ 直接替换📋 参考替代料（不在目录中）
SI4112-D-GT 规格参数
| Device Type | Dual-band RF frequency synthesizer IC |
| Maximum Listed Frequency | 1 GHz |
| Output Channel Count | 1 |
| Architecture | PLL RF synthesizer with integrated VCOs |
| Output Function | IF output |
| 封装 | 24-TSSOP |
| Package Width | 0.173 inch |
| Overall Package Width | 4.40 mm |
| 安装类型 | Surface mount |
| Nominal Frequency-Synthesis Band Count | Dual-band |
| Wireless Communications Use | Personal wireless communications applications |
| Integrated VCO | Yes |
| External VCO Requirement | Eliminated by integrated VCO architecture |
| External Varactor Requirement | Eliminated by integrated VCO architecture |
SI4112-D-GT 4.40 mm 引脚配置指南
SI4112-D-GT（4.40 mm 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： SI4112-D-GT.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SI4112-D-GT 适用于 7 应用s: Wireless RF Transceiver, RF Down-Conversion Receiver, Wireless Transmitter, Intermediate-Frequency Signal Generation, Compact Wireless Communication Module, RF Signal-Source Subsystem, Wireless Communication Test Fixture.
Wireless RF Transceiver
The SI4112-D-GT fits wireless RF transceivers that need programmable frequency generation close to the RF signal chain. Its verified 1 GHz maximum listed frequency, dual-band synthesis, integrated VCOs, and IF output are useful for receiver or transmitter architectures requiring a compact local frequency source. The integration can reduce the number of external VCO and varactor components, but the design must still validate phase noise, tuning range, output level, matching, and reference-clock performance against the complete manufacturer datasheet.
推荐
RF Down-Conversion Receiver
In an RF down-conversion receiver, the SI4112-D-GT can generate a programmable local oscillator or IF-related signal for frequency translation. The verified IF output and dual-band synthesizer description make it relevant to compact wireless receiver designs. Engineers should confirm whether the selected synthesis band covers the required LO frequencies and verify reference sensitivity and phase noise, because those values are not provided in the verified snippets and directly determine receiver image and noise performance.
推荐
Wireless Transmitter
The SI4112-D-GT can serve as a compact RF source in wireless transmitter circuitry where a dual-band synthesizer and integrated VCO reduce external RF component count. The verified manufacturer description emphasizes price-sensitive, low-power personal-wireless use and elimination of external VCOs and varactor diodes. Before selecting it for a transmitter, verify output power, tuning accuracy, spur performance, supply range, and thermal behavior because these electrical limits are not supplied in the available records.
推荐
Intermediate-Frequency Signal Generation
The verified IF-output feature makes the SI4112-D-GT relevant to systems that need a controlled intermediate-frequency source. In a receiver or transmitter, this signal can support frequency conversion, channel-specific modulation, or test-oriented signal generation. The component should be placed with careful reference routing, RF grounding, impedance control, and output matching. Exact IF frequency range and output-level data must be obtained from the manufacturer datasheet before fixing the surrounding filter and amplifier network.
推荐
Compact Wireless Communication Module
The SI4112-D-GT is well aligned with compact wireless modules that prioritize board area and low external-component count. Its integrated VCO architecture can eliminate separate VCO and varactor assemblies, while the 24-TSSOP package supports surface-mount assembly. In a module design, verify the reference-clock source, loop-filter components, supply decoupling, RF output matching, and thermal path. The supplied sources support the use case but do not provide enough data to guarantee regulatory or operating-temperature compliance.
推荐
RF Signal-Source Subsystem
The SI4112-D-GT can provide the programmable RF source used in a larger signal-generation or conversion subsystem. Its dual-band operation, integrated VCOs, and IF output support frequency-agile RF architectures, while the compact TSSOP package can reduce PCB footprint compared with a discrete VCO implementation. The subsystem designer must account for reference jitter, loop bandwidth, output buffering, filtering, matching, and isolation between sensitive RF stages; those design values are not specified in the supplied search data.
推荐
Wireless Communication Test Fixture
A wireless communication test fixture can use the SI4112-D-GT as an RF frequency source when the test system needs compact programmable synthesis. The verified 1 GHz maximum listed frequency and IF output provide a useful starting point for fixture architecture, but a production test design requires confirmed tuning range, frequency accuracy, phase noise, output power, and calibration behavior. Use controlled reference routing and shielded RF layout to prevent unintended radiation and to make measurements repeatable across multiple units.
推荐
推荐产品汇总
工程参考数据： SI4112-D-GT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | SI4112-D-GM | SI4112-D-GTR |
|---|---|---|---|
| Package | 24-TSSOP | TSSOP-24 | TSSOP-24 |
| Brand | Skyworks Solutions | Skyworks Solutions | Skyworks Solutions |
关键差异点
- Integrated dual-band RF synthesizer architecture （对比 SI4112-D-GM)
- Wireless personal-communications positioning （对比 SI4112-D-GTR)
- Reduced external RF component count （对比 Generic discrete-VCO PLL implementation)
设计说明
Keep the reference-clock and RF output paths short, with a continuous ground reference and minimal discontinuities. A frequency synthesizer can amplify reference and routing noise into phase and frequency errors, so use the manufacturer’s recommended reference and decoupling arrangements rather than general-purpose digital-layout assumptions.
Place input and output decoupling components close to the SI4112-D-GT pins and preserve the 24-TSSOP land pattern exactly as defined by the manufacturer package drawing. The verified data confirms the TSSOP-24 package but not individual pin names, so PCB release must wait for the official pinout and footprint verification.
Do not treat a related SI4112 suffix as a drop-in replacement without checking frequency range, electrical limits, reference interface, loop-filter requirements, and pin assignments. The supplied cross-reference results identify SI4112-D-GM and SI4112-D-GTR as related search candidates, but they do not establish full substitution equivalence.
Calculate dissipation from the actual supply voltage, output condition, and RF operating mode before selecting copper area or thermal relief. The verified records do not provide power dissipation, junction temperature, or thermal-resistance data, so a numerical thermal estimate would be speculative and should be avoided until those values are obtained from the manufacturer datasheet.
合规信息
The supplied verified data identifies Skyworks Solutions and describes the device as an RF synthesizer for wireless communications, but it does not provide RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements.
